12143142 has 32 divisors (see below), whose sum is σ = 29439360. Its totient is φ = 3679560.

The previous prime is 12143137. The next prime is 12143143. The reversal of 12143142 is 24134121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9628 + ... + 10815.

It is an arithmetic number, because the mean of its divisors is an integer number (919980).

Almost surely, 2^12143142 is an apocalyptic number.

12143142 is an abundant number, since it is smaller than the sum of its proper divisors (17296218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12143142 is a wasteful number, since it uses less digits than its factorization.

12143142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20465 (or 20459 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 12143142 is about 3484.7011349612. The cubic root of 12143142 is about 229.8495676672.

Adding to 12143142 its reverse (24134121), we get a palindrome (36277263).

It can be divided in two parts, 1214 and 3142, that added together give a square (4356 = 66²).

The spelling of 12143142 in words is "twelve million, one hundred forty-three thousand, one hundred forty-two".